Floor-polisher.



W. B. THAYER.

FLOOR POLISHER. APPLICATION FILED JAN.13. 1914. RENEWED MAR. 5, i915.

1 9 1%. %1L 'F. Patented June 1, 1915.

2 SHEETS-SHEET l.

IIVI/E/VTOR W. B. THAYER.

FLO0R POLISHER, APPLICATION FILED 1AN.13, I914. RENEWED MAR. 5, I915. v

Patented June 1, 1915.

. SHEETs-SHEET 2.

I/VI/E/VTOH mm? 5 754 y 4 I W ferred' form of which is against. j

\ moon-Penman.

Specification of Letters Patent.-

Patented June it, 1915..

Application filed. January 13, 1914 Serial No. 811,832. Renewed March5,1915; Serial No. 12,412.

I T all whom it may concern Be it known that I, WILLIAIVL B. THAYER, acitizen of the United States, residing at Kansas City, in the county ofJ ackson and State of Missouri, have invented certain new and usefulImprovements in Floor- Polishers; and I do declare the following to bea, full, clear, and exact description of the invention, su'ch as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying. drawings, and to theletters andfigures of reference markedtherewhich form a part of thisspecification. My invention relates to a floor polishing machine, andhas for its principal object to I driven machine for polishor otherprovide a power ing or grinding a board, stone, floor, or I horizontalsurface.

In accomplishing this object, I have provided improved details ofstructure the preillustrated'in the accompanying drawings, wherein:

Figure I is a perspective viewof afloor polishing machine constructed inaccord ance with my invention. FigLII is an inverted perspective View ofthe polisher head,

v showing a number of grinding members .east metal,

nismfl FigL'IV is handle mounting.

ings (not shown),

monntedthereon. Fig. III is showing its mounting and adjusting mechaadetail perspective of the Fig. V is a similar view ofthe handle head,showing a wiring 'ar-I rangement.

Referring'more in detail to the parts: 1

designates a carrying member comprising a bodyil; which is preferablycomposed of in order to provide suflicient weight to hold the machineagainst vibration' whenthe parts are in operation, and which is'supported on casters 3 that are preferably provided with anti-frictionbeafrinorder that the body may be turned freely to project the polisherhead to any desired position. I

The front endof the body 2 is concaved and provided with a base socket4into which the lower end of a carrying head'f 5is promay be bracedjected, so that the head against transverse strain, and mounted on 6having forwardly shaft 9 is revolubly and-slidably mounted. Revolublymounted on the shaft 9 and a vertical sectinn of a. portion ofthepolisher head shaft,

seated'on the lower collar 8 is'a bevel gear wheel 11 having a keyl2gprojected into a feather groove 13 in the shaft9, so that the shaftmay be revolved'from the gear wheel without nterfering with its verticalsliding travel, and meshing with the gear wheel 12 is a bevel gea'rwheel 14 that is fixed on the end of the drive shaft '15, which isjournaled in a bearing 16 on" the bracket Gand has operative'connectionwith a motor 17 that is supported on the carrier body 2.

-The motor is preferably of an electrical type, and has feed wires19that are preferably extendedfthrough a hollow handle 20, whichispreferably connected -,with the carrying body by. a yoke 21,,liavinend members 22 lyingflatagainst the si es of I members. 27 and inclosesa switch box 28, where connection 1S made between the feed wires 19 andfixture Wires 29, and wherein the flow of current may be controlledbetween the'separate sets of wires by meansof a switch-30.

-Mounted on the lower endof the shaft 9 is ahead 32, preferablylof; castmetal, in order to provide weight or pressure for the polishers, andremovably connected with the head, preferably by attaching the sametheretov by lag' bolts 33 are polishers 34, one

- form of whi'chcomprises a bracket 35hava, base adapted to lie flatagainst the ing face of the head and receive the lag under bolts 83, andhaving grooves-36- in its oppo-.

site face for receiving the rails 37 of" a pollar type'of member hereillustrated consistingof an emery stone, which is'"particularly highpoints .in a

or polishers may be slid. e

In actual use, I prefer toglue or otherwise seal the polishing membersin their brackets, for

play therein the .vibration and jar' of the I ishing or grinding member38; the particuhe bracket into which the stones facerof, the bracketinto which the stones life the reason that if allowed any stones againstthe brackets would soon disintegrate the stones'.

I. also preferably ings, for the reason that with this arrangeejected toobviate clogging of the machine.

the-motor is connected with raised Without interfering with v current isturned into the. motor ment' I not only provide for variation in thegrain and area of extent of initialcontact, but provide an open endchannel therebetween, through which material removed from the floor andfrom the stones may be lVhile the head- 32 and the polishers pro videsufficient weight, the weight may, in some instances, be greater than isadvisable to employ and in order to relieve the pol isher of theundesirable weight, and also provide for lifting the head when themachine is being moved, I mount a lifting knob 41 on the top of theshaft by dropping a flange 4-2 from the bottom of the knob around theshaft and projecting pins 48 through the flange into an annular groove al in the upper end of the shaft, so that when the knob is lifted theshaft may be its revoluble travel. The pins may be projected throughapertures in the knob flange and then welded or otherwise permanentlysecured to the flange, and the parts of the pins that project into theshaft grooves are preferably provided with anti-friction rollers 46 toobviate friction on the shaft when it is raised while revolving.

In order to hold the polishing head off of the floor while the machineis being moved, I pivota post 47 on the upper bracket collar 8 so thatit may lie fiat on the collar to allow the shaft to descend to operativeposition, or may be raised to engage the under side of the knob when theshaft is elevated and support the knob and shaft, so that the polisherhead is held above the floor.

In using the machine, presuming the parts to be constructed andassembled as described, and presuming its use on amarble orlike floor,

a source of supply, usually a lighting fixture, so that when bymanipulation of the switch in the handle of the machine, the polisher isrevolved through the When the polisher is revolved, the stones carriedthereby are revolved rapidly over the surface of the floor, and thelatter polished or ground down toan even surface, the weight of-the castmetal head, supplemented by thatof the vertical shaft and the weight ofthe stones themselves, providing 'suflicient pressure to carry on thegrinding process. When it is necessary to move the machine to adifierent point, or should a high point in the floor be encountered, theoperator lifts the knob 41 to move the shaft 9 vertically in itsbearings and through the bevel gear wheel 11, thereby raising thepolisher head from thefloor. The machine may then be moved to the properposition and the polisher lowered perpendicularly to again contact thesurace.

By having the front of the carrier body concaved, as illustrated, thepolisher may be set in close to the body and thereby not only economizespace, but facilitate the control of the polisher, and by mounting thehandle on the carrier body by the pin and slot connection the handleis'made adjustable, so that control of the machine is facilitated; itbeing apparent that by properly locating the handle the body may bepivoted on the rear or forward carrying wheels, to lesson or increasepressure on the polisher head.

Having thus described my invention, what I claim'as new therein, anddesire to secure by Letters-Patent, is

In a floor polishing machine, a supporting member comprising body andground wheels, a body, means for actuating the polisher, and arhandlehaving yoke arms at its lower end overlying the side edges of the bodymember and provided with slots, and pins on said body member projectedthrough said slots and anchoring the yoke arms to the body member.

2. In a floor polishing machine comprising a portable supporting member,having a socketed forward end, a bracket fixed to said supporting memberwithin said socketed end, bearing members on said 'bracket,'a shaftrevolubly mounted in saidbearing member, a. polishing head fixed on saidshaft, a bevel gear feathered on said shaft and adapted for support onsaid bearing member, a second shaft revolubly mounted in said bracket atright angles to said first shaft, a bevel gear fixed to said secondshaft and meshing with the bevel gear on said first shaft, a motordirectly connected to said second, shaft, a knob having pin and slotconnection with the upper end of said first shaft for raising saidpolishing head through said socket, a latch pivotally mounted on saidbearing member and adapted for projection beneath said knob to hold saidpolishing head in elevated position, a tubular handle adjustably mountedon said supporting member, a hand grip on said handle, circuit wires insaid tubular handle, and a switch in said hand grip for controllingcurrent in said circuit wires.

In testimony whereof I afiix my signature in presence of two witnesses.

WILLIAM B. THAYER.

Witnesses:

LYNN A. RoBINsoN, L. E. CoATs.

polisher supported on said

